Trying to split a 64 channel 48Khz 24 bits Wave file. That is VERY slow. ffmpeg -i /Volumes/Data/magweg/64channel.wav -filter_complex "[0]pan=mono|c0=c0[tr0]" -c:a pcm_s24le -map "[tr0]" /Volumes/Data/magweg/64_test/out_1.wav
Runs at about 15x But if I do all 64 in one pass, it slows down to about 0.7x I don’t get it. DiskIO should not be a factor, and there is no math involved. (Granted, the ppm_s24le might involve math, but that should be simple.) Is this a bug? (Same happens vice versa, going from multiple non-interleaved to one big interleaved Wave.) Bouke _______________________________________________ ffmpeg-user mailing list ffmpeg-user@ffmpeg.org https://ffmpeg.org/mailman/listinfo/ffmpeg-user To unsubscribe, visit link above, or email ffmpeg-user-requ...@ffmpeg.org with subject "unsubscribe".
